package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;
    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate){
        this.stringRedisTemplate=stringRedisTemplate;
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

//        HttpSession session = request.getSession();
//        Object user = session.getAttribute("user");
//
//        if (user ==null){
//            response.setStatus(401);
//            return false;
//        }
//        UserHolder.saveUser((UserDTO) user);
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)){
            return true;
        }
        String tokenKey = RedisConstants.LOGIN_USER_KEY + token;
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash()
                .entries(tokenKey);
        if (userMap.isEmpty()){
          return true;
        }
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        UserHolder.saveUser(userDTO);
        stringRedisTemplate.expire(tokenKey,RedisConstants.LOGIN_USER_TTL, TimeUnit.SECONDS);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
          UserHolder.removeUser();
    }
}
